1763. 最长优美子字符串
Easy | Hash Table, String, Divide and Conquer, Bit Manipulation, Sliding Window
Hash Table
1775. 用最少操作次数使两个数组的和相等
Medium | Array, Hash Table, Greedy, Counting
1781. 所有子字符串美丽值之和
Medium | Hash Table, String, Counting
1782. 统计点对的数量
Hard | Array, Hash Table, Two Pointers, Binary Search, Graph Theory, Sorting, Counting
1790. 检查一次字符串交换能否使两个字符串相等
Easy | Hash Table, String, Counting
1796. 字符串中第二大的数字
Easy | Hash Table, String
1797. 设计身份验证管理器
Medium | Hash Table, Linked List, Design, Doubly-Linked List
1807. 计算字符串中括号对的值
Medium | Array, Hash Table, String
1814. 数组中的好数对
Medium | Array, Hash Table, Math, Counting
1817. 找到用户的活跃分钟数
Medium | Array, Hash Table
1830. 使字符串有序的最少操作次数
Hard | Hash Table, Math, String, Combinatorics, Counting
1832. 检查句子是否为全字母句
Easy | Hash Table, String
1857. 有向图中最大颜色值
Hard | Hash Table, String, Dynamic Programming, Graph Theory, Topological Sort, Memoization, Counting
1865. 寻找特定和的数对
Medium | Array, Hash Table, Design
1876. 长度为三的不同字符子串
Easy | Hash Table, String, Sliding Window, Counting
1893. 检查是否所有整数都被数组覆盖
Easy | Array, Hash Table, Prefix Sum
1897. 重新分配字符使所有字符串都相等
Easy | Hash Table, String, Counting
1912. 设计电影租赁系统
Hard | Array, Hash Table, Design, Heap (Priority Queue), Ordered Set
1930. 长度为3的唯一回文子序列
Medium | Hash Table, String, Bit Manipulation, Prefix Sum
1932. 合并多个二叉搜索树
Hard | Array, Hash Table, Tree, Depth-First Search, Binary Search Tree, Binary Tree